Lead Data Scientist: Agentic AI & Personalization

MRJ Recruitment Limited; Manchester; On-site; GBP 90,000 - 130,000; Full time

Job summary

MRJ Recruitment Limited is seeking a Lead Data Scientist to shape and deliver high-impact ML and AI capabilities in a fast-moving B2C marketplace. You will lead agentic search experiences and intelligent decisioning influencing discovery, conversion and retention.

You will work with the Chief Data Officer and cross-functional teams to turn data into measurable outcomes, driving strategy and delivery across engineering, marketing and product.

Qualifications

• Proven experience delivering customer-facing ML solutions in a B2C product environment.
• Strong background in search, information retrieval, ranking and/or recommendation systems (preferred).
• Experience applying modern AI approaches, with interest in agentic AI/LLM-enabled patterns.
• Solid understanding of experimentation, causal thinking and measurement (A/B testing, offline/online metrics).
• Hands-on proficiency in data science toolsets (e.g., Python) and strong fundamentals in statistics and ML.
• Experience with Snowflake and cloud environments, ideally AWS, and deployment collaboration with data/ML engineering.

Responsibilities

• Own and evolve the data science roadmap across agentic search, ranking and recommendation systems.
• Lead end-to-end model development: framing problems, feature design, experimentation, evaluation, deployment and iteration.
• Build and optimise ranking and recommender models balancing relevance, diversity, fairness, and business objectives.
• Apply agentic AI approaches to improve discovery journeys and decisioning with LLM-enabled workflows.
• Partner with Marketing and Loyalty teams to improve personalisation, segmentation, churn reduction and lifetime value.
• Drive robust experimentation practices (A/B testing, uplift modelling, measurement frameworks).
• Collaborate with Engineering on production-grade ML systems, data pipelines and monitoring in AWS and Snowflake.
• Mentor and support other data scientists, elevating standards for scientific thinking and communication.

Skills

Customer-facing ML

Search/IR/Ranking

AI/Agentic AI

Experimentation & measurement

Python / ML tooling

Snowflake & AWS

Tools

Snowflake

AWS

Job description

MRJ Recruitment Limited is seeking a Lead Data Scientist to shape and deliver high-impact ML and AI capabilities in a fast-moving B2C marketplace. You will lead agentic search experiences and intelligent decisioning influencing discovery, conversion and retention.

You will work with the Chief Data Officer and cross-functional teams to turn data into measurable outcomes, driving strategy and delivery across engineering, marketing and product.